• Nuclear Engineering and Technology
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• 제55권5호
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• pp.1644-1650
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• 2023

In spent fuel reprocessing, UO₂(DBP)₂ (U-DBP) can be deposited in stainless steel equipment. U-DBP must be removed by dissolution and the process must not cause corrosion to stainless steel. This study was conducted to find the best scheme for dissolution. U-DBP was manufactured by the titrimetric sedimentation method. The effects of different factors on the dissolution of U-DBP were investigated. For example, solid-liquid ratio, hydrazine carbonate solutions with different mass components, mixed solutions containing different concentrations of H₂O₂, and different carbonates. The results indicated that U-DBP does not have a regular crystal morphology. With the increase of the solid-liquid ratio and the mass fraction of hydrazine carbonate, the concentration of U(VI) at the dissolution equilibrium increases gradually. The addition of H₂O₂ has a great promotion effect on the dissolution. However, when the concentration of H₂O₂ is greater than 0.5 M, the dissolution solution may have an erosive effect on the stainless steel. (NH₄)₂CO₃ can increase the dissolution capacity of dissolved U-DBP, but it may also accelerate the corrosion of stainless steel.

• 한국전문물리치료학회지
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• 제1권1호
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• pp.10-16
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• 1994

The purpose of this study was to establish a baseline in order that individuals may exercise safely. Sixty healthy students who were divided into two groups participated in the experiment. One group exercised both arms and legs at 60 rpm and the other at 90 rpm. There was a significant difference between arm and leg exercise in diastolic blood pressure (DBP) and time to target heart rate (tTHR). DBP decreased more in the upper (U//E) than the lower extremity (L/E), but tTHR increased more in the L/E than the U/E (p < 0.05). Systolic blood pressure (SBP) was similar for both arm and leg exercise (p > 0.05). There was also no significant difference between 60 rpm and 90 rpm in SBP, DBP or tTHR in either arm or leg exercise (p > 0.05). In conclusion, the slope of the linear increase in heart rate was steeper for U/E than L/E work. Therefore L/E exercise is safer than U/E exercise.

• Journal of Dental Anesthesia and Pain Medicine
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• 제15권4호
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• pp.201-205
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• 2015

Background: This prospective, randomized, double-blind, clinical study was conducted to compare the effects of 4% articaine with 1:100,000 epinephrine (A100) and 4% articaine with 1:200,000 epinephrine (A200) on the vital signs and onset and duration of anesthesia in an inferior alveolar nerve block (IANB). Methods: In the first appointment, an IANB was performed by injecting A100 or A200 in 1 side of the mouth (right or left) randomly in patients referred for extraction of both their first mandibular molars. In the second appointment, the protocol was repeated and the other anesthetic solution was injected in the side that had not received the block in the previous session. Systolic and diastolic blood pressures (SBP and DBP) and pulse rate were measured during and 5 min after the injection. The onset and duration of anesthesia were also evaluated. Data were analyzed using t-test and Mann-Whitney U-test, and p-value was set at 0.05. Results: SBP and pulse rate changes were slightly more with A100; however, DBP changes were more with A200, although the differences were not significant (P > 0.05). There were no statistically significant differences in the parameters evaluated in this study. The onset and duration of anesthesia, and the changes in SBP, DBP, and pulse rate during and 5 min after the injection were the same in both the groups. Conclusions: For an IANB, A200 and A100 were equally efficient and successful in producing the block. Epinephrine concentration did not influence the effects of 4% articaine.

• 대한지역사회영양학회지
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• 제3권4호
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• pp.574-582
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• 1998

This study was carried out to discover the effects of eating habits and health-related life style on blood pressure, $\gamma$-Glutamic acid Peptide Transferase($\gamma$-GPT), blood glucose and High Density Lipoprotein-Cholesterol(HDL-C). 185 subjects(85 male, 100 female) were selected, who were living in the Cheonju area aged 40#s to 60#s. The mean systollic blood pressure(SBP), diastollic blood pressure (DBP), $\gamma$-GPT, fasting blood sugar(FBS) and HDL-C for all the subjects were 118mmHg, 77mmHg, 281U/l, 90mg/dl and 45mg/dl, respectively. The SBP and DBP for subuects over 60 years old were 126mmHg and 81mmHg and were significantly higher than subjects in their 40#s and 50#s(p<0.001, p<0.005). The HDL-C of the group that rarely ate breakfast was 57mg/dl and that was significantly higher than the 44mg/dl scored by those who ate breakfast everyday(p<0.05). The SBP for subjects having a snack 2-3 times/week was 125mmHg and that was significantly higher than the 114mmHg of those having a snack everyday(p<0.05). The $\gamma$-GPT for subjects consuming alcohol everyday was 44IU/L and that was significantly higher than 18IU/I of the non-drinking group(p<0.001). The $\gamma$-GPT of light smokers was 53IU/I and that was significantly higher than the 22IU/I for non-smoking participants(p<0.001). The DBP, SBP, $\gamma$-GPT, FBS and HDL-C related to exercise not significantly different. The SBP(p<0.001) and DBP(p-0.01) between age group was positively correlated. The $\gamma$-GPT between drinking frequency(p<0.001), drinking quantity(p<0.05), and smoking(p<0.05) was also positively correlated. The FBS between exercises had a negative correlation(p<0.05), and the HDL-C between breakfast had a negative correlation(p<0.05). These results indicate that decreasing drinking and smoking, when combined with appropriate exercise, will decrease the $\gamma$-GPT and fasting blood sugar level, and help preventing adult diseases.

• 대한약침학회지
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• 제18권2호
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• pp.33-41
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• 2015

Objectives: The present study evaluated the effects of sa-am acupuncture (SAA) simpo-jeongkyeok (SPJK) treatment on the blood pressure (BP), pulse rate (PR), and body temperature (BT) of patients with hwa byung (HB). Methods: This patient assessor blind, randomized, placebo controlled trial included 50 volunteers, divided randomly into two groups. The treatment group underwent SPJK (PC9, LR1, PC3, KI10) while the control (sham) group received minimal needle insertion at non acupoints. The BP in both arms, PR, and BT at several acupoints were measured before and after treatment at the $1^{st}$, $2^{nd}$, $3^{rd}$, and $4^{th}$ visits and before treatment at the follow-up visit. We analyzed data by using the repeated measured analysis of variance (RM ANOVA), Mann-Whitney U, and wilcoxon signed rank tests; differences at P < 0.05 were considered significant. Results: No significant differences in the systolic blood pressure (SBP), diastolic blood pressure (DBP) and PR between the treatment and control group were observed at each visit. However, the decrease in the SBP for the treatment group before and after each visit was significantly higher than it was in the control group. The SBP in both arms in the treatment group was decreased between visits 1 and 2, 1 and 3, 1 and 4, and 1 and follow-up. The DBP in both arms and in the right arm between visits 1 and 3 in the treatment group showed decreases. A minimal BT increase for treatment at CV06 and CV12 and a minimal BT decrease for treatment at CV17 and (Ex) Yintang were found. Patients in the treatment group who visited more frequently experienced a greater decrease in the PR, but that effect was not maintained. Conclusion: The results suggest that SAA SPJK treatment has instant positive effects on the BP, PR, and BT in patients with HB, but the effects on the BP and PR are not maintained.

• 성인간호학회지
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• 제24권2호
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• pp.139-148
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• 2012

Purpose: A study was designed to compare heart rate variability (HVR) of older adults with postprandial hypotension (PPH) with older adults with no PPH. Methods: The samples were community-dwelling older adults (${\geq}$ 60 years old) with PPH (n=35) and without PPH (n=35). HRV was measured by 10 minutes of electrocardiography using Physiolab 400 and analyzed in time domain (SDNN) and with power spectral analysis in frequency domain (TP, LF, HF, LF/HF). Blood pressure was measured every 15 minutes before and until 120 minutes after the meal. Results: All HRV parameters were lower in the PPH group compared to those with no PPH. Specifically the measures of SDNN, TP, LF, and LF/HF of the PPH group were significantly lower (U=385.0, $p$=.008; U=361.0, $p$=.003; U=375.0, $p$=.005; U=368.0, $p$=.004, respectively). Further, the LF and LF/HF of SBP (${\geq}140$ mmHg) group and the LF/HF of DBP (${\geq}$ 90 mmHg) group were significantly lower ($x^2$=6.33, $p$=.042; $x^2$=33.10, $p$ <.001; $x^2$=11.03, $p$=.004, respectively). Conclusion: These findings indicate that the autonomic nervous functions in persons with PPH are less activated than those persons with no PPH. The findings contribute to an understanding of HRV and the association of autonomic nervous function with the mechanism of PPH.

• 한국식품영양과학회지
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• 제36권3호
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• pp.318-326
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• 2007

본 연구에서는 대구 경북지역 20, 30대 남성근로자 224명을 대상으로 BMI에 따른 신체적 특성, 건강상태를 조사하였다. BMI는 20대 $23.67\;kg/m^{2}$, 30대 $23.95\;kg/m^{2}$로 조사대상자 모두 대한비만학회에서 제시한 정상 범위인 $18.5{\sim}23\;kg/m^{2}$에서 벗어난 과체중으로 조사되었다. BMI에 따른 신체적 특성은 체중, 이상체중비율, BMI 모두에서 유의적인 차이(p<0.001)를 나타냈다. 그리고 신체둘레 측정 결과 허리 둘레, 엉덩이 둘레, 허리/엉덩이 둘레비는 비만군, 과체중군, 정상군 순으로 유의적인 차이(p<0.001)를, 허리/엉덩이 둘레는 30대가 20대보다 크게(p<0.01)나타났다. 체구성성분 측정 결과 체지방률{body fat(%)}과 체지방량{body fat(kg)}은 비만군, 과체중군, 정상군 순으로 유의적인 차이(p<0.001)를 보였다. BMI가 증가함에 따라 관리요망군과 질환의심군의 비율이 유의적으로(p<0.001) 증가하였고, 평균 혈압은 비만군이 정상군 및 과체중군보다 높은 유의적인 차이(p<0.001)가 있었으며, 공복시 혈당은 30대가 20대보다 높은 유의적인 차이(p<0.05)를 보였다. 간질환의 유무를 알 수 있는 지표인 SGOT, SGPT 및 $\gamma-GTP$는 BMI별로 보면 비만군은 정상군 및 과체중군보다 높아 유의적인 차이(SGOT, SGPT; p<0.001, $\gamma-GTP$; p<0.01)를 보였으며 비만군의 SGOT는 43.58 U/L로 정상범위에서 벗어났다. $\gamma-GTP$를 연령별로 보면 30대가 34.74 U/L로 정상군에는 속하지만 20대의 28.06 U/L보다 높은 유의적인 차이(p<0.05)를 보였다. 건강상태와 음주 및 흡연 유무에 따른 생화학적 상태를 살펴보면, 건강상태에 따른 수축기혈압은 관리요망군, 질환의심군, 정상군 순으로 유의적인 차이(p<0.01)를 보였으며, 확장기혈압, 총콜레스테롤, 공복 시 혈당, SGOT, SGPT 및 ${\gamma}-GTP$는 정상군 및 관리요망군과 질환의심군 간에 유의적인 차이(p<0.001)를 보였다. $\gamma-GTP$는 음주 근로자가 33.79 U/L, 비음주 근로자가 26.64 U/L로 집단 간의 유의적인 차이(p<0.05)를 보였고, 수축기 혈압과 헤모글로빈은 각각 흡연 근로자가 124.65 mmHg, 15.82 g/dL이고, 비흡연근로자는 120.43 mmHg, 15.38 g/dL로 나타나 집단 간의 유의적인 차이(p<0.01)를 보였다. 체중이 많이 나갈수록 BMI, 이상체중비율(%), 허리둘레 및 엉덩이둘레, 허리/엉덩이 둘레비, 체지방량, 체지방률(%)이 높으며, 이에 따라 수축기혈압과 확장기혈압, 총콜레스테롤, 공복 시 혈당, SGOT, SGPT, $\gamma-GTP$ 모두 높아진다(p<0.001, p<0.01, p<0.05). 이상의 결과를 종합해보면, 조사대상자인 20, 30대 남성 근로자 대부분이 과체중에 속하며, 체중이 증가할수록 BMI, 허리둘레, 엉덩이둘레, 체지방률(%) 등이 증가하고 BMI가 높아질수록 수축기혈압과 이완기혈압, SGOT, SGPT, $\gamma-GTP$ 등의 생화학적 수치들이 높아져 건강상태가 좋지 않게 된다. 음주와 흡연 역시 혈압, $\gamma-GTP$ 등을 높여 건강상태 악화에 한 몫을 하는 것으로 나타났다. 따라서 20, 30대 남성근로자들의 연령 및 비만도의 증가에 따라 건강상태가 나빠지며 성인병 유병률의 가능성이 높아짐을 인식하고, 이러한 건강 위험요인들을 개선할 수 있는 노력이 필요할 것이라 사료된다. 정기적인 건강검진과 더불어 규칙적인 운동과 음주, 흡연, 업무 과중, 스트레스와 같은 생활습관 및 불규칙한 식습관을 개선할 수 있는 방안의 모색이 요구된다.

• 여성건강간호학회지
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• 제9권3호
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• pp.224-234
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• 2003

Purpose: This study was to test the effects of a full body massage on labor pain and delivery stress reaction for primipara during labor. Method: This study employed a quasi- experimental method(nonequivalent control group, pre-post test design). The subjects of this study were 57 primipara hospitalized at the U OB & GYN hospital in Inchon from November 1. 2001 to July 31, 2002. 28 women were assigned to the experimental group and 29 to the control group. The experimental group was given 20 minutes full body massage for each of three delivery phases. The control group was given conventional delivery care. The levels of labor pain were measured by the Visual Analogue Scale and the expression scores of the labor pain and the levels of delivery stress reaction were measured by pulse rate, respiration rate, and blood pressure, and State-Anxiety Scale. Data were analyzed using the repeated measures analysis of covariance(ANCOVA), t-test, $X^2$- test, simple ANCOVA with SPSS program. Result: There was no interaction effect between time and group(F=.370, p=.693), but significant time effects were found for subjective labor pain(F=3.840, p=.028). There was no interaction effect between time and group(F=.112, p=.894), but significant group effects were found for objective labor pain(F=12.299, p=.001). There was no interaction effect between time and group for PR(F=.172, p=.843), RR(F=.626, p=.539), SBP(F=.089, p=.915), DBP(F=.748, p=.479), but significant group effects were found for SBP(F=7.547, p=.008). The level of status anxiety of the experimental group was significantly lower than the control group(F=11.787, p=.001). Conclusion: This study showed that the full body massage has partially positive effect on labor pain and delivery stress reaction. Therefore this study suggested that the full body massage might be used clinically to help primipara during labor.

• 한국방재학회:학술대회논문집
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• 한국방재학회 2008년도 정기총회 및 학술발표대회
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• pp.413-416
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• 2008

Recently, the results of vital tissue test showed that nitrosodimethylamine (NDMA) as a disinfection by-product (DBP), could be regarded as a carcinogen because a tumor was observed in organs. U.S.EPA indicated 0.7 ng/L as exposure concentration of NDMA based on a risk assessment target with a lifetime cancer risk of $10^{-6}$. Several recent studies have shown that UV oxidation could remove NDMA. However, UV oxidation is uneconomical and can reform NDMA after treating. In addition, the treatment mechanism of adsorption has not been founddue to the uncertainty of NDMA pathway. In addtion, NDMA has a radioisotope $^{14}C$-labeled which can be analyzed at low concentration of NDMA by Liquid Scintillation Counter (LSC). This study has investigated NDMA determination using LSC at an extremely low range from 1 to 100 ng/L and NDMA removal by powdered activated carbon (PAC) adsorption. For $^{14}C$-NDMA by LSC, the highest correlation over 99% between count number and NDMA concentrationwas obtained with possibility of $^{14}C$-NDMA concentration up to 1 ng/L. In the presence of PAC ranging from 50 to 10,000 mg/L, $^{14}C$-NDMA was removed from 18% to 97% for Sigma-Aldrich corporation (S-A co.) and from 9% to 93% by PAC for Daejung corporation (Dj co.). Hence it was found that the removal efficiency by PAC adsorption could vary depending on PAC types from different companies. For PAC adsorption capacity of $^{14}C$-NDMA using the Freundlich isotherm, $K_f$ and 1/n of PAC from S-A co. were $2.67\times10^{-3}$ ng/mg and 1.009, while those of PAC from Dj co. were $1.30\times10^{-3}$ ng/mg and 0.994, respectively. Thus, PAC from S-A co. showed twice higher adsorption capacity than Dj co.

• 한국식품영양과학회지
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• 제35권2호
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• pp.164-170
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• 2006

본 연구에서는 흡연율이 높은 성인 남자에 있어 흡연상태에 따라 비흡연군(47명), 흡연군(58명), 흡연경험군(44명)으로 나눠 영양섭취와 혈압, 혈액 성상 및 지질패턴을 비교분석하였다. 전체대상자의 평균 연령, 신장, 체중, 체질량지수 각각 54.7세, 165.8 cm, 67.3 kg, $24.5\;kg/m^2$이었으며, 흡연 상태에 따른 세 군간 유의한 차이가 없었다. 1일 평균 에너지와 단백질 섭취량은 각각 1740.9 kcal와 59.69 g이었으며, 흡연군간 유의한 차이가 없었다. 엽산 섭취량은 비흡연군 $324.2{\mu}g$, 흡연군 $235.1{\mu}g$, 흡연경험군 $272.7{\mu}g$으로 흡연군이 유의하게 낮았으나, 콜레스테롤 섭취량은 비흡연군 175.6mg, 흡연군 232.5 mg, 흡연경험군 154.3 mg으로 흡연군이 유의하게 높았다. 1일 총 식품 섭취량은 비흡연군 1250.0 g, 흡연군 1180.1 g, 흡연경험군 1237.5 g으로 세 군간 유의한 차이가 없었다. 버섯류의 섭취량은 비흡연군 1.5g, 흡연군 0.4g, 흡연경험군 4.8 g으로 흡연군이 유의하게 낮은 반면, 난류의 섭취량은 세 군 각각 8.3 g, 17.8 g, 4.4 g으로 흡연군이 유의하게 높았다. 전체대상자의 적혈구수와 혈청 GOT, GPT는 각각 $4598.2\times1000/mm^2$, 27.3 U/L, 27.3 U/L이었으며 비흡연군, 흡연군, 흡연경험군간 유의한 차이가 없었다. 그러나 백혈구수, 헤마토크릿, 헤모글로빈 농도는 흡연군이 각각 $6727.7/mm^3,\;45.9\%$, 14.7g/dL로 비흡연군($4921.5/mm^3,\;43.4\%$, 13.9 g/dL)이나 흡연경험군($5845.4/mm^3,\;44.2\%$, 13.9 g/dL)보다 유의하게 높았다. 전체대상자의 평균 혈압은 128.3/75.5 mmHg이었으며, 혈청 콜레스테롤, 중성지방, HDL-콜레스테롤, LDL-콜레스테롤, 동맥경화지수는 각각 180.2 mg/dL, 160.8 mg/dL, 41.5 mg/dL, 106.5 mg/dL, 3.5로 흡연상태에 따른 세 군간 유의한 차이가 없었다. 그러나 흡연군의 중성지질 농도는 비흡연군보다 유의하게 높았다. 이상의 연구결과를 종합할 때 흡연자는 비흡연자보다 엽산 섭취가 낮고 콜레스테롤 섭취가 높았으며, 백혈구수, 헤마토크릿과 헤모글로빈, 중성지질 함량이 높게 나타나 흡연이 일부 영양소의 섭취와 혈액성상에 변화를 초래하는 것으로 보여진다. 또한 흡연경험자는 비흡연자와 영양소 섭취와 혈액성상에 유의한 차이를 보이지 않아 흡연으로 인한 일부 영양소 섭취와 혈액성상의 변화는 금연으로 인해 비흡연 상태로 회복되는 것으로 생각된다. 따라서 흡연자를 대상으로 한 금연 교육이 우선적으로 요구되며, 흡연으로 인한 영양섭취의 변화가 인체에 미치는 영향을 설명 할 수 있는 직접적이고 세부적인 연구를 통해 흡연자의 영양 문제점과 그에 따른 식사관리 방안이 마련되어야 할 것이다.